严禁采用一线一地、两线一地、三线一地安装用电设备和器具。
参考答案：对
The children ran away from the orchard(果园)_____ they saw the guard.[ ]
A. for the first time
B. by the first time
C. the first time
D. at the first time
天敌昆虫可分为（ ）和（）两大类。
